I'm super excited that my son wants to listen to SOTW in the car. BUT, for this next year we are actually doing co-op where we'll listen to a chapter... do a project of some sort... each week for 30 weeks. There is SOOO much information in SOTW :) I learn something each time I listen, too. We have used her materials since I found it, and I'm really happy that with cd, book, and all the pages available... it's really quite complete. We will also use a book basket for more reading, since SOTW sparks interest for even more detailed study :)